- drill collar API
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| Model： | NC 23 31 | |||
| Origin： | China | |||
| Category： | > Industrial Supplies > Machining Tool | |||
| Keywords： | drill collar drill pipe kelly stabilizer drill stem subs | |||
| Price： | Chinese Yuan / PC | |||
| Min. Order： | 1 PC | |||
- Product Description
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Drill collar:
Our drill collars are manufactured from 4145H modified steel.Drill collars are bored and drifted to API Spec7-1 and fully heated to meet or exceed the mechanical property requirements of API Spec7.Hardness range of 285-341HB and a charpy V notch impact value of 54joules are guaranteed one inch below the surface.
On enquiries and orders ,please specify:
Slick or spiral;
Drill collar OD;
Drill collar bore:
Length of drill collar;
Connection type;
Stress-relief grooves:
Stress-relief grooves decease the frequence of fatigue failures by improving the bending strength of pin and box connections and reducing high stress concentrations.Sress-relief features are manufactured in compliance with API Spec7,unless otherwise specified by customers.
Slip recess and elevator recess :
Shenlong offers optional elevator and slip recesses to improve handling efficiency and safety.The
upper radius of elevator recess is cold-rolled to increase product life.Slip and elevator recesses can be used together or seperately.Unless otherwise specified,slip and elevator recesses are machined in compliance with API RP7G guidline.
- Product Image
- Contact Information of this Company
| Company Name︰ | Shenlong petroleum drilling tools Co.,Ltd | |
| Company Address︰ | industrial park of Jiyuan city,Henan,China | |
| Company Phone︰ | 86-391-6635031 | |
| Company Fax︰ | 86-391-6635036 | |
| Contact Person︰ | Penny Zhang ( overseas sales ) | |
| Mobile︰ | 86-13839124954 | |
| Website︰ | http://www.petrodrillingtools. | |
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